A method of monitoring the status of a body of a person during sleep, said method comprising: - retaining in or adjacent the mouth or nose of said person an electronic detector which detects indications of the state of said body, - wirelessly transmitting a first data stream representing said indications to a data receiving means, - transmitting said first data stream from said data receiving means to a data processing means, - processing said first data stream within said data processing means to produce a second data stream representing said indications, or conclusion drawn from said indications, and - displaying a visual representation of said indications or conclusions.
